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alex41 [277]
3 years ago
8

How do measurements of time differ for events in a frame of reference that moves at 50% of the speed of light relative to us? At

99.5% of the speed of light relative to us?
Mathematics
2 answers:
ZanzabumX [31]3 years ago
7 0

Answer with explanation:

Relation between Speed , Distance and time

Distance =Speed × Time

→It means Speed is inversely Proportional to time.

As distance will remain constant , in that frame of reference

If speed of light in a Medium

                              =s=3 \times 10^8 \frac{\text{meter}}{\text{second}}

Then, time taken to cross the medium = t seconds or hours or another unit of time.

Now, If speed of light is 50% of the speed of light relative to us

    That is Speed of light in another medium

                 =w=\frac{50}{100} \times 3 \times 10^8\\\\=1.5 \times 10^8 \frac{\text{meter}}{\text{second}}

Then, time taken to cross the medium = 2t seconds or hours or another unit of time.

Using Unitary Method

  \rightarrow v_{1}\times t_{1}=v_{2} \times t_{2}\\\\1.\rightarrow 3 \times 10^8 \times t=\frac{50}{100} \times 3 \times 10^8 \times t_{1}\\\\t_{1}=2t\\\\2.\rightarrow 3 \times 10^8 \times t=\frac{99.5}{100} \times 3 \times 10^8 \times t_{2}\\\\t_{2}=\frac{1000t}{995}\\\\t_{2}=\frac{200t}{199}

             

beks73 [17]3 years ago
3 0

Answer:

1.154 times the proper time

10.013 times the proper time

Step-by-step explanation:

Speed of light = c

At 50% speed of light

v = 0.5c

Time dilation

\Delta t'=\frac{\Delta t}{\sqrt{1-\frac{v^2}{c^2}}}\\\Rightarrow \Delta t'=\frac{\Delta t}{\sqrt{1-\frac{0.5^2c^2}{c^2}}}\\\Rightarrow \Delta t'=\frac{\Delta t}{\sqrt{1-0.25}}\\\Rightarrow \Delta t'=\frac{\Delta t}{0.866}\\\Rightarrow \Delta t'=1.154\Delta t

Time would differ by 1.154 times the proper time

At 99.5% speed of light

v = 0.995c

Time dilation

\Delta t'=\frac{\Delta t}{\sqrt{1-\frac{v^2}{c^2}}}\\\Rightarrow \Delta t'=\frac{\Delta t}{\sqrt{1-\frac{0.995^2c^2}{c^2}}}\\\Rightarrow \Delta t'=\frac{\Delta t}{\sqrt{1-0.990025}}\\\Rightarrow \Delta t'=\frac{\Delta t}{0.09987}}\\\Rightarrow \Delta t'=10.013\Delta t

Time would differ by 10.013 times the proper time.

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The length of a rectangle is twice its width. if the area of the rectangle is 128 ft2 , find its perimeter.
kupik [55]
Length(l)= 2w
Width(w)= w
Area(A) = l*w

A= 128 ft²
128= l*w
128= (2w)w
2w²= 128
w²= 64
w=√64= 8 ft
w= 8 ft

length(l)= 2w
l=2(8)
l=16 ft

P= 2l+2w
P=2(16)+2(8)= 32+16= 48ft
P= 48ft

Answer:
The Perimeter of this rectangle is 48 feet.


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